Journal ArticleDOI
Large Depth of Field Pseudo-Bessel Beam Generation With a RLSA Antenna
Agnese Mazzinghi,Massimo Balma,Dorina Devona,Giacomo Guarnieri,Giuseppe Mauriello,Matteo Albani,Angelo Freni +6 more
TLDR
In this article, the authors discussed the possibility of generating a pseudo-Bessel beam, with a propagation distance of several hundreds of wavelengths in microwave and millimeter frequency band, by using a radial line slot array (RLSA).Abstract:
The paper discusses the possibility of generating a pseudo-Bessel beam, with a propagation distance of several hundreds of wavelengths in microwave and millimeter frequency band, by using a radial line slot array (RLSA). A specific application for non-contact microwave detection of buried mines has been considered as test case. The design benefits of a holographic approach to assure the required aperture field distribution and makes use of an ad hoc optimization tool to control the antenna slot layout. The predicted and measured antenna behaviors show that high efficiency and polarization purity can be obtained by such a compact and flat antenna, achieving at the same time both manufacturing and setup simplicity.read more
Citations
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Journal ArticleDOI
A Broadband Bessel Beam Launcher Using Metamaterial Lens
TL;DR: Full-wave simulation and experiment results have proved that the generated Bessel beams can be maintained in distance larger than 1 meter within a ranging from 12 GHz to 18 GHz.
Journal ArticleDOI
Generation of spatial Bessel beams using holographic metasurface.
TL;DR: Backward radiations of leaky waves supported by a holographic metasurface are used to produce spatial Bessel beams in the microwave frequency regime, which may be useful in imaging applications or wireless power transmissions with the dynamic focal-depth controls.
Journal ArticleDOI
Highly efficient generation of Bessel beams with polarization insensitive metasurfaces.
Muhammad Rizwan Akram,Muhammad Qasim Mehmood,Tauseef Tauqeer,Ahsan Sarwar Rana,Ivan D. Rukhlenko,Weiren Zhu +5 more
TL;DR: Owing to the isotropy of the unit cells and the rotational symmetry of the arrangements, the proposed metasurfaces are polarization insensitive, providing a promising avenue for achieving such wave manipulations with any linear or circular polarization.
Journal ArticleDOI
Generation of non-diffractive Bessel beams by inward cylindrical traveling wave aperture distributions
TL;DR: The proposed system and accurate analysis of non-diffractive Bessel beams launched by inward waves opens new opportunities for planar, low profile beam generators at microwaves, Terahertz and optics.
Journal ArticleDOI
Experimental Validation of Bessel Beam Generation Using an Inward Hankel Aperture Distribution
TL;DR: In this paper, an azimuthally invariant inward traveling wave distribution is defined over the aperture of a radial line slot array (RLSA) to launch a Bessel beam whose normal electric field component assumes a truncated, zeroth-order Bessel function.
References
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Journal ArticleDOI
Diffraction-free beams.
TL;DR: The first experimental investigation of nondiffracting beams, with beam spots as small as a few wavelengths, can exist and propagate in free space, is reported.
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Exact solutions for nondiffracting beams. I. The scalar theory
TL;DR: In this paper, exact nonsingular solutions of the scalar-wave equation for beams that are non-diffracting were presented, which means that the intensity pattern in a transverse plane is unaltered by propagating in free space.
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Bessel beams: Diffraction in a new light
David McGloin,Kishan Dholakia +1 more
TL;DR: In this article, the theoretical foundation of the Bessel beam is described and various experiments that make use of Bessel beams are discussed: these cover a wide range of fields including non-linear optics, where the intense central core of the bessel beam has attracted interest; short pulse non-diffracting fields; atom optics, and optical manipulation where the reconstruction properties of the beam enable new effects to be observed that cannot be seen with Gaussian beams.
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A radial line slot antenna for 12 GHz satellite TV reception
TL;DR: In this paper, the authors proposed a planar antenna which can radiate circularly polarized pencil beams in the x-band for the application of receiving direct broadcast from a satellite (DBS).